Explosive-engine.



PATENTED SEPT. 18, 1906.

F. A. JAHN. EXPLOSIVE ENGINE. APPLICATION FILED AUG. 12, 1905.

fA l livfo/c To all u Ihom itmwy concern.

zen of the United States,

FRANK A ri, or DAvENPoRrioWA.

ExPLoswE-sNemE.

Specification of Letters Patent.

Patented Sept. 18, 1906.

Application filed August 12,1905- Serial No. 273,892.. I

Be .it known that I, FRANK A. J AHN, a citiresiding at Davenport, in the county of Scott and State of Iowa, provements in Explosive-Engines, the following is a specification.

My invention relates to explosive-engines,

of which and more particularly to the means for operating the exhaust-valve.

The; object of valve.

i and claimed. 1

. pin'17, on which astar-w 35 operate gear.

A further object is to. provide a valve-gear which shall be simple and eflicient in opera? tion, ha

no complicated parts.

I These ob ects are attained by certain novel features of construction hereinafter described In the accompanying drawings, Figure 1 is a side elevation of an explosive-engine provided with my valve-gear. Figs. 2 to 6 are he operation 'ofthe diagrams illustrating Referring specifically to the drawings, 10 denotes the engine-frame; 11, the cylinder; 12, the piston-rod connected to the crankshaft 13, which isxjournaled in bearings on the frame 10. At 14 is-indicated a lever which is fulcrumed,-as at 15, on the engine-frame. One end of the lever isconnected to the exhaustvalve stem '16, and its 0p osite end carries a heel 18 is rotatably mounted. The star-wheel has four arms 19, the outer ends of which are recessed, as at 20,- for a purpose to be hereinafterdescribed.

At 21 :sindicated a collar which is fast on the or lk-shaft.

pile star-wheel andcooperates therewith to the exhaust-valve in a manner to be hereinafter described.

The end of the lever 14, carrying the starwheel, is normally lifted by a spring 23, which is fastened to a suitable bracket 24 on the en 'e-frame.

In Figs. 2 to 6 the operation of the mechhave invented new and useful Im-= ed directly into the invention is to provide means for a rapid opening and closing of the by the This collar carries a pin 22,. which extends into the path of thearms 19 of sition of the parts at the beginning of the suction-stroke. Fig. 3 shows the end of the suction-stroke. During these two strokes the star-wheel is idle, not being enga ed the pin. During the compression-stro e the pinstrikes one of the arms 19 and tilts the star-wheel so that one of its arms is extendthe path of the pin 22, as shown in Fig. 4,. hich is the end of the compression-stroke. The charge is now fired, and at the end of the power-stroke the gin reaches the arm, as shown in Fig. 5, so t at during the exhaust-stroke the pin engages the recess 20 in the' arm,as shown in Fig. 6, and bears down'thereon, whereby thelever 14 is tilted, whicho ens the exhaust-valve. When the pin leaves t e arm, the lever ilsflpulled up bythe s ring 23', which closes the e austvalve and rings the star-wheel to its normal position, as shown inFig. 2,readyfor the next cycle. The star-wheel works tightly, so that it not s in or turn beyond position.

invention, what 1 Having t us described my is claimed as new, and desired .to. be secured by Letters Patent, is- 1. The combination with a, crank-shaft and the exhaust-valve of an ex losive-engine, of a lever for operating the valire and carrying a rotatablesta'r-Wheel, and means carried crank-shaft for. setting and bearing down thereon to tilt the lever and open the exhaust-valve.

2. The combination with and the exhaust-valve of an ex losive-eng1ne,

the star-wheel anism is clearly shown. Fig. 2 shows the poa. crank-shaft of a lever'for operating the va ve, a rotatable member carried by the lever and having radial arms, and a trip carried by the crank shaft and arranged to bear on the outer endst the lever and open the exof the arms to t haust-valve.

' In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' FRANK A. JAHN.

Witnesses:

EMID N. T. JAHN, O. J. Ramon-N. 

